Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999astl...25..809e&link_type=abstract
Astronomy Letters, Volume 25, Issue 12, December 1999, pp.809-813
Astronomy and Astrophysics
Astronomy
4
Scientific paper
The two components of the visual binary BD+40o175 were observed spectroscopically with a circular polarization analyzer attached to the 6-m telescope. The two stars were found to possess strong magnetic fields. The effective magnetic field of the brighter CP star BD+40o175A varies from -2.0 to -3.4 kG. The second star, which lies at 3.7 arcsec from the first star, exhibits more intense spectral lines and has a variable magnetic field ranging from +0.8 to +2.6 kG. The rare-Earth elements, including Sr, Eu, Sm, Gd, Nd, and others, are appreciably overabundant in the two components. These stars have similar effective temperatures, Teff = 8000 +/- 400 K, as inferred from the H_gamma line. The projected rotational velocity v sin(i) was found from the profiles of FeII 4491 A with a low Lande factor to be no higher than 20 km/s for each star.
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